<b> void enableDataPoint(String xid);</b> <br/>
<b> void disableDataPoint(String xid);</b> <br/>
<b> void writeDataPoint(String xid, String value);</b> <br/>

<br>
<p>
Note: These commands will only succeed if the data points added to the context 
and its data sources are enabled in the system.
</p>